On Fri, 21 May 2010 04:18:08 +0000 (UTC), "Robert Olin"
wrote:

If I use a manifold system, can I eliminate individual shut off valves, like
under the sink or at the toilet? Is the code man ok with that?

Yes and Yes (if local codes allow PEX).

My house is a PEX manifold system. All lines are a home run from the
manifold - 11 cold and 9 nine hot supply lines. I have no stop valves
at any water feature. I can turn them off at the manifold (central
location in the laundry room) or turn the house off in the garage and
at the street meter. House is built early 1997, single story.

What if I use the manifold for an area like one bathroom?

Let say I have a typical bathroom on one manifold. If the pex is 1/2" I
assume that is adequate for the toilet and sink, but I'm wondering if a tub
or shower should have their own dedicated hot and cold back to the manifold?


Each supply line hot/cold is a home run from the manifold. Think
octopus tentacles